mirror of
https://github.com/splunk/security_content
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Patrick Bareiss
66 lines
3.6 KiB
YAML
66 lines
3.6 KiB
YAML
name: GitHub Organizations Disable 2FA Requirement
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id: 3ed0d6ba-4791-4fa8-a1ef-403e438c7033
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version: 1
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date: '2025-01-17'
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author: Patrick Bareiss, Splunk
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status: production
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type: Anomaly
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description: The following analytic detects when two-factor authentication (2FA) requirements are disabled in GitHub Organizations.
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The detection monitors GitHub Organizations audit logs for 2FA requirement changes by tracking actor details, organization information,
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and associated metadata. For a SOC, identifying disabled 2FA requirements is critical as it could indicate attempts to weaken account security
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controls. Two-factor authentication is a fundamental security control that helps prevent unauthorized access even if passwords are compromised.
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Disabling 2FA requirements could allow attackers to more easily compromise accounts through password-based attacks. The impact of disabled 2FA
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includes increased risk of account takeover, potential access to sensitive code and intellectual property, and compromise of the software supply chain.
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This activity could be part of a larger attack chain where an adversary first disables security controls before attempting broader account compromises.
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data_source:
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- GitHub Organizations Audit Logs
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search: '`github_organizations` vendor_action=org.disable_two_factor_requirement
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| fillnull
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| stats count min(_time) as firstTime max(_time) as lastTime by actor, actor_id, actor_ip, actor_is_bot, actor_location.country_code, business, business_id, org, org_id, user_agent, vendor_action
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| eval user=actor
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| `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
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| `github_organizations_disable_2fa_requirement_filter`'
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how_to_implement: You must ingest GitHub Organizations logs using Splunk Add-on for Github using a Personal Access Token https://docs.splunk.com/Documentation/AddOns/released/GitHub/Configureinputs .
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known_false_positives: unknown
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references:
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- https://docs.splunk.com/Documentation/AddOns/released/GitHub/Configureinputs
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- https://www.googlecloudcommunity.com/gc/Community-Blog/Monitoring-for-Suspicious-GitHub-Activity-with-Google-Security/ba-p/763610
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drilldown_searches:
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- name: View the detection results for - "$user$"
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search: '%original_detection_search% | search user = "$user$"'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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- name: View risk events for the last 7 days for - "$user$"
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search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$user$") starthoursago=168 | stats count min(_time) as firstTime max(_time) as lastTime values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories) as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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rba:
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message: $user$ disabled 2FA requirement in GitHub Organizations
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risk_objects:
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- field: user
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type: user
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score: 25
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threat_objects:
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- field: user_agent
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type: http_user_agent
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tags:
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analytic_story:
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- GitHub Malicious Activity
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asset_type: GitHub
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mitre_attack_id:
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- T1562.001
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- T1195
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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security_domain: network
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tests:
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- name: True Positive Test
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attack_data:
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- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/github_disable_two_factor_requirement/github.json
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source: github
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sourcetype: github:cloud:audit
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